Firth of Clyde in the context of "Blackwaterfoot"

The North Channel (known in Irish and Scottish Gaelic as Sruth na Maoile, in Scots as the Sheuch) is the strait between north-eastern Ireland and south-western Scotland. The Firth of Clyde merges with the channel, between the southern tip of the Kintyre peninsula and Corsewall Point on the Rhins of Galloway. Part of the Irish Sea, the channel begins north of the Isle of Man and runs north-west into the Atlantic Ocean. Within the channel is Beaufort's Dyke, the deepest part of which is 312 metres (1,024 ft).

The Antonine Wall (Latin: Vallum Antonini) was a turf fortification on stone foundations, built by the Romans across what is now the Central Belt of Scotland, between the Firth of Clyde and the Firth of Forth. Built some twenty years after Hadrian's Wall to the south, and intended to supersede it, while it was garrisoned it was the northernmost frontier barrier of the Roman Empire. It spanned approximately 63 kilometres (39 miles) and was about 3 metres (10 feet) high and 5 metres (16 feet) wide. Lidar scans have been carried out to establish the length of the wall and the Roman distance units used. Security was bolstered by a deep ditch on the northern side. It is thought that there was a wooden palisade on top of the turf. The barrier was the second of two "great walls" created by the Romans in Great Britain in the second century AD. Its ruins are less evident than those of the better-known and longer Hadrian's Wall to the south, primarily because the turf and wood wall has largely weathered away, unlike its stone-built southern predecessor.

Construction began in AD 142 at the order of Roman Emperor Antoninus Pius. Estimates of how long it took to complete vary widely, with six and twelve years most commonly proposed. Antoninus Pius never visited Britain, unlike his predecessor Hadrian. Pressure from the Caledonians probably led Antoninus to send the empire's troops farther north. The Antonine Wall was protected by 16 forts with small fortlets between them; troop movement was facilitated by a road linking all the sites known as the Military Way. The soldiers who built the wall commemorated the construction and their struggles with the Caledonians with decorative slabs, twenty of which survive. The wall was abandoned only eight years after completion, and the garrisons relocated rearward to Hadrian's Wall. Most of the wall and its associated fortifications have been destroyed over time, but some remains are visible. Many of these have come under the care of Historic Environment Scotland and the UNESCO World Heritage Committee.

Caledonia (/ˌkælɪˈdoʊniə/; Latin: Calēdonia [kaleːˈdonia]) was the Latin name used by the Roman Empire to refer to the forested region in the central and western Scottish Highlands, particularly stretching through parts of what are now Lochaber, Badenoch, Strathspey, and possibly as far south as Rannoch Moor, known as Coed Celedon (Coed Celyddon using the modern alphabet) to the native Brython (Britons). Today, it is used as a romantic or poetic name for all of Scotland. During the Roman Empire's occupation of Britain, the area they called Caledonia was physically separated from the rest of the island by the Antonine Wall. It remained outside the administration of Roman Britain.

Latin historians, including Tacitus and Cassius Dio, referred to the territory north of the River Forth as "Caledonia", and described it as inhabited by the Maeatae and the Caledonians (Latin: Caledonii).

This is a list of islands of Scotland, the mainland of which is part of the island of Great Britain. Also included are various other related tables and lists. The definition of an offshore island used in this list is "land that is surrounded by seawater on a daily basis, but not necessarily at all stages of the tide, excluding human devices such as bridges and causeways".

Scotland has around 900 offshore islands, most of which are to be found in four main groups: Shetland, Orkney, and the Hebrides, sub-divided into the Inner Hebrides and Outer Hebrides. There are also clusters of islands in the Firth of Clyde, Firth of Forth, and Solway Firth, and numerous small islands within the many bodies of fresh water in Scotland including Loch Lomond and Loch Maree. The largest island is Lewis and Harris, which extends to 2,179 km (841 sq mi), and there are a further 200 islands which are greater than 40 hectares (100 acres) in area. Of the remainder, several, such as Staffa and the Flannan Isles, are well-known, despite their small size. Some 101 Scottish islands are currently permanently inhabited, of which 96 are offshore islands. Between 2001 and 2011, Scottish island populations as a whole grew by 4% to 103,702 although by 2022 the total had fallen back to just under 103,000.

Kintyre (Scottish Gaelic: Cinn Tìre, Scottish Gaelic pronunciation: [kʲʰiɲˈtʲʰiːɾʲə]) is a peninsula in western Scotland, in the southwest of Argyll and Bute. The peninsula stretches about 30 miles (50 kilometres), from the Mull of Kintyre in the south to East and West Loch Tarbert in the north. The region immediately north of Kintyre is known as Knapdale.

Kintyre is long and narrow, at no point more than 11 miles (18 kilometres) from west coast to east coast, and is less than two miles (three kilometres) wide where it connects to Knapdale at the north. Kintyre is the lower Firth of Clyde western coast and protects the Firth from the Atlantic Ocean. The southerly tip of Kintyre is on the North Channel that separates southwestern Scotland from Northern Ireland. The east side of the Kintyre Peninsula is bounded by Kilbrannan Sound, with a number of coastal peaks such as Torr Mor. The central spine of the peninsula is mostly hilly moorland, the highest point being Beinn an Tuirc at 454 metres (1,490 feet). The coastal areas and hinterland, however, are rich and fertile. Kintyre has long been a prized area for settlers, including the early Scots who migrated from Ulster to western Scotland and the Vikings or Norsemen who conquered and settled the area just before the start of the second millennium.

Corsewall Point, or Corsill Point, is the headland at the northwestern end of the Rhins of Galloway, in Dumfries and Galloway, west of Scotland.

Corsewall Point is the southeasterly boundary point between the Firth of Clyde and the North Channel, with the southerly tip of the Kintyre Peninsula the northwest point. The North Channel is customarily considered as part of the Irish Sea.

The Inner Seas off the West Coast of Scotland is a marine area designated by the International Hydrographic Organization (IHO). It consists of a number of waterbodies between the Scottish mainland, the Outer Hebrides islands, and the coast of Ireland.

Waterbodies within the Inner Seas include the Minch and Little Minch, the Sound of Harris, the Inner Sound, the Sea of the Hebrides, the Firth of Lorn, the Sound of Jura, the Firth of Clyde, Belfast Lough and the North Channel. The IHO defines the limits of the Inner Seas as follows:

Ailsa Craig (/ˈeɪlsə/; Scottish Gaelic: Creag Ealasaid) is an island of 99 ha (240 acres) in the outer Firth of Clyde, 16 km (8+1⁄2 nmi) west of mainland Scotland, upon which microgranite has long been quarried to make curling stones. The now-uninhabited island comprises the remains of a magmatic pluton formed during the same period of igneous activity as magmatic rocks on the nearby Isle of Arran.

The island, colloquially known as "Paddy's Milestone" because it is halfway between Belfast and Glasgow, was a haven for Catholics during the Scottish Reformation in the 16th century, but is today a bird sanctuary, providing a home for huge numbers of gannets and an increasing number of puffins.